307.5=.04(v^2)+1.1(v)

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Solution for 307.5=.04(v^2)+1.1(v) equation:


Simplifying
307.5 = 0.04(v2) + 1.1(v)

Reorder the terms:
307.5 = 1.1v + 0.04v2

Solving
307.5 = 1.1v + 0.04v2

Solving for variable 'v'.

Reorder the terms:
307.5 + -1.1v + -0.04v2 = 1.1v + -1.1v + 0.04v2 + -0.04v2

Combine like terms: 1.1v + -1.1v = 0.0
307.5 + -1.1v + -0.04v2 = 0.0 + 0.04v2 + -0.04v2
307.5 + -1.1v + -0.04v2 = 0.04v2 + -0.04v2

Combine like terms: 0.04v2 + -0.04v2 = 0.00
307.5 + -1.1v + -0.04v2 = 0.00

Begin completing the square.  Divide all terms by
-0.04 the coefficient of the squared term: 

Divide each side by '-0.04'.
-7687.5 + 27.5v + v2 = 0

Move the constant term to the right:

Add '7687.5' to each side of the equation.
-7687.5 + 27.5v + 7687.5 + v2 = 0 + 7687.5

Reorder the terms:
-7687.5 + 7687.5 + 27.5v + v2 = 0 + 7687.5

Combine like terms: -7687.5 + 7687.5 = 0.0
0.0 + 27.5v + v2 = 0 + 7687.5
27.5v + v2 = 0 + 7687.5

Combine like terms: 0 + 7687.5 = 7687.5
27.5v + v2 = 7687.5

The v term is 27.5v.  Take half its coefficient (13.75).
Square it (189.0625) and add it to both sides.

Add '189.0625' to each side of the equation.
27.5v + 189.0625 + v2 = 7687.5 + 189.0625

Reorder the terms:
189.0625 + 27.5v + v2 = 7687.5 + 189.0625

Combine like terms: 7687.5 + 189.0625 = 7876.5625
189.0625 + 27.5v + v2 = 7876.5625

Factor a perfect square on the left side:
(v + 13.75)(v + 13.75) = 7876.5625

Calculate the square root of the right side: 88.75

Break this problem into two subproblems by setting 
(v + 13.75) equal to 88.75 and -88.75.

Subproblem 1

v + 13.75 = 88.75 Simplifying v + 13.75 = 88.75 Reorder the terms: 13.75 + v = 88.75 Solving 13.75 + v = 88.75 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-13.75' to each side of the equation. 13.75 + -13.75 + v = 88.75 + -13.75 Combine like terms: 13.75 + -13.75 = 0.00 0.00 + v = 88.75 + -13.75 v = 88.75 + -13.75 Combine like terms: 88.75 + -13.75 = 75 v = 75 Simplifying v = 75

Subproblem 2

v + 13.75 = -88.75 Simplifying v + 13.75 = -88.75 Reorder the terms: 13.75 + v = -88.75 Solving 13.75 + v = -88.75 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-13.75' to each side of the equation. 13.75 + -13.75 + v = -88.75 + -13.75 Combine like terms: 13.75 + -13.75 = 0.00 0.00 + v = -88.75 + -13.75 v = -88.75 + -13.75 Combine like terms: -88.75 + -13.75 = -102.5 v = -102.5 Simplifying v = -102.5

Solution

The solution to the problem is based on the solutions from the subproblems. v = {75, -102.5}

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